As of today Sony has announced the full Gran Turismo 5 car list. It consists of 10,000 cars. At launch it will only have 340 cars while the others will be developed in the future. Polyphony Digital will also develop cars for individual clients. That means in the future we could have any car put into the game for a special price. Of course..
Source and List - http://www.gtcenter.eu/gt/gran-turi...cks-everyone-gran-turismo-5s-amazing-car-list

EDIT: I said "Over 9,000 Cars" because I have if you put the list into word, it shows below 10,000 cars.
Source and List - http://www.gtcenter.eu/gt/gran-turi...cks-everyone-gran-turismo-5s-amazing-car-list
EDIT: I said "Over 9,000 Cars" because I have if you put the list into word, it shows below 10,000 cars.